808409392621 has 16 divisors (see below), whose sum is σ = 830003134464. Its totient is φ = 787004650224.

The previous prime is 808409392613. The next prime is 808409392631. The reversal of 808409392621 is 126293904808.

It is not a de Polignac number, because 808409392621 - 2³ = 808409392613 is a prime.

It is a super-3 number, since 3×808409392621³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808409392631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12786730 + ... + 12849796.

It is an arithmetic number, because the mean of its divisors is an integer number (51875195904).

Almost surely, 2^808409392621 is an apocalyptic number.

It is an amenable number.

808409392621 is a deficient number, since it is larger than the sum of its proper divisors (21593741843).

808409392621 is a wasteful number, since it uses less digits than its factorization.

808409392621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64560.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 808409392621 in words is "eight hundred eight billion, four hundred nine million, three hundred ninety-two thousand, six hundred twenty-one".